Scania COMMUNICATOR DTC 778 Communication with the visibility system (VIS)

COMMUNICATOR Communicator (C200 / C300 / C400) · Scania

Code 778 (decimal). Some diagnostic tools show it in hexadecimal as 030A.

In short

The RTC control unit has not received any CAN messages from the VIS control unit within the time expected.

Applies to: C300

What does Scania COMMUNICATOR fault code 778 mean?

The RTC control unit has not received any CAN messages from the VIS control unit within the time expected.

What causes Scania DTC 778?

- Fault in the CAN bus or its cable harness. - Fault in the coordinator. - Fault in the VIS control unit.

What are the symptoms?

Vehicle and driver data from the VIS control unit is not displayed correctly in the fleet management system.

How to fix Scania COMMUNICATOR fault code 778?

  1. Check for active fault codes in other control units on the yellow CAN bus affecting communication with the VIS control unit.
  2. Check the CAN bus and its cable harness.
  3. Check the coordinator and its CAN connection.
  4. Check the VIS control unit and its CAN connection.

This information is for guidance only. Always follow the manufacturer workshop manual and safety procedures; if in doubt, contact an authorised workshop.

Code 778 in other Scania systems

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